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1. Homework Statement

1. Homework Statement

A 75-kg snowboarder has an initial velocity of 5.0 m/s at the top of a 28 ∘ incline. After sliding down the 110-mlong incline (on which the coefficient of kinetic friction is μk = 0.18), the snowboarder has attained a velocity v. The snowboarder then slides along a flat surface (on which μk = 0.15) and comes to rest after a distance x.

Use Newton's second law to find the snowboarder's acceleration while on the incline and while on the flat surface.

## Homework Equations

F_net = ma

## The Attempt at a Solution

I already drew a free body diagram when the snowboarder is on the incline with the normal force perpendicular to the slope, the force of gravity is pointing downwards, and the force of kinetic friction is pointing parallel to the slope. I know I need to use F_net = ma but I'm still very confused on how to set it up. I'm also having trouble deciding the coordinate system to use and how it relates to finding F_net.